<?php
  
 /**
  * @package JooS
  * @subpackage Syntax_PHPackager
  */

  require_once "JooS/Syntax/Complex/Transition.php";

  abstract class JooS_Syntax_PHPackager_Relations_Abstract extends JooS_Syntax_Complex_Transition {
    /**
     * @return JooS_Syntax_Abstract
     */
    abstract function getRelationItemSyntax();

    /**
     * @return string
     */
    public function compile() {
      $ret = parent::compile();
      if ($ret !== false) {
        $ret = "array(" . $ret . ")";
      }
      return $ret;
    }

    /**
     * @return JooS_Syntax_Complex_Concatenate
     */
    public function createRule() {
      $parser = $this->getParser();
      return $parser->createSyntax("Complex_Concatenate", array(
        $parser->createSyntax("Common_Whitespace"),

        $parser->createSyntax("Complex_Repetition", $parser->createSyntax("Complex_Concatenate", array(
          $this->getRelationItemSyntax(), 
          $parser->createSyntax("Complex_Repetition", $parser->createSyntax("Complex_Concatenate", array(
            $parser->createSyntax("Common_Whitespace"),
            $parser->createSyntax("Simple_Symbol", ","),
            $parser->createSyntax("Common_Whitespace"),
            $this->getRelationItemSyntax(), 
          ))), 
          $parser->createSyntax("Common_Whitespace"),
        )), 1), 
      ));
    }
  }
